FPGA based demodulation of laser induced fluorescence in plasmas

Mattingly, Sean W.; Skiff, Fred

doi:10.1063/1.4995971

Title: FPGA based demodulation of laser induced fluorescence in plasmas

Journal Article · 19 April 2018 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/1.4995971 · OSTI ID:1540118

Mattingly, Sean W. ^[1]; Skiff, Fred ^[2]

Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy; DOE/OSTI
Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy

We present a field programmable gate array (FPGA)-based system that counts photons from laser-induced fluorescence (LIF) on a laboratory plasma. This is accomplished with FPGA-based up/down counters that demodulate the data, giving a background-subtracted LIF signal stream that is updated with a new point as each laser amplitude modulation cycle completes. We demonstrate using the FPGA to modulate a laser at 1 MHz and demodulate the resulting LIF data stream. Finally, this data stream is used to calculate an LIF-based measurement sampled at 1 MHz of a plasma ion fluctuation spectrum.

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Research Organization:: Univ. of Iowa, Iowa City, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-99ER54543

OSTI ID:: 1540118

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 89; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (17)

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